Quantitative Aptitude - Arithmetic Ability Questions

Q:

Train A can cross a man in 8 sec and a 180 m long platform ‘P’ in 17 sec. If train A cross train B which is running in opposite direction at speed of 108 km/hr in 8 sec, then find time taken by train B to cross platform P? 

A) 16 sec B) 11 sec
C) 14 sec D) 12 sec
 
Answer & Explanation Answer: C) 14 sec

Explanation:

Let length of train A be ‘L’ m and speed be ‘V’ m/s

ATQ –

V =

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Filed Under: Problems on Trains
Exam Prep: AIEEE , Bank Exams , CAT

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Q:

The ratio of present ages of P and Q is 8 : 5. After 4 years their ages will be in the ratio 4 : 3 respectively. What will be the ratio of P’s age after 7 years from now and Q’s age now?

A) 3:2 B) 1:2
C) 2:1 D) 3:1
 
Answer & Explanation Answer: D) 3:1

Explanation:

Let the present age of P be 8x and Q be 5x After 4 years, P's age = 8x + 4 and Q's age = 5x + 4 8x+4/5x+4 = 4/3 24x+12 = 20x+16 => 4x = 4=> x = 1 Present age of P = 8 years Present age of Q = 5 years Required ratio = 15 : 5 = 3 : 1

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Q:

Rearrange the jumbled up letters to form a meaningful word and find the odd one out.

A) CEKRTCI B) OHKCYE
C) ESCSH D) OTOLABLF
 
Answer & Explanation Answer: C) ESCSH

Explanation:
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Filed Under: Odd Man Out
Exam Prep: Bank Exams

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Q:

A cube is placed inside a cone of radius 20 cm and height 10 cm, one of its face being on the base of the cone and vertices of opposite face touching the cone. What is the length (in cm) of side of the cube?

A) 5 B) 6
C) 8 D) 9
 
Answer & Explanation Answer: C) 8

Explanation:
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Filed Under: Area
Exam Prep: Bank Exams

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Q:

To travel 432 km, an Express train takes 1 hour more than Duronto. If however, the speed of the Express train is increased by 50%, it takes 2 hours less than Duronto. What is the speed (in km/hr) of Duronto train?

A) 60 B) 54
C) 48 D) 72
 
Answer & Explanation Answer: B) 54

Explanation:
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Filed Under: Problems on Trains
Exam Prep: Bank Exams

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Q:

If in a two digit number, the digit at unit place is z and the digit at tens place is 8, then the number is

A) 80z + z B) 80 + z
C) 8z + 8 D) 80z + 8
 
Answer & Explanation Answer: B) 80 + z

Explanation:
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Filed Under: Problems on Numbers
Exam Prep: Bank Exams

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Q:

Sandy and Mandy do (8/13)th part of a work and the rest of the work was completed by Andy. If Sandy, Mandy and Andy take the same work for Rs. 2600, then what is the share (in Rs) of Andy?

A) 1600 B) 1400
C) 800 D) 1000
 
Answer & Explanation Answer: D) 1000

Explanation:
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Filed Under: Time and Work
Exam Prep: Bank Exams

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Q:

At present, the sum of ages of 4 people is 76. After 7 years, the ratio will be 7:6:5:8. Find out the present age of C?

A) 12 B) 11
C) 17 D) 13
 
Answer & Explanation Answer: D) 13

Explanation:

Ans.
Currently :
A+B+C+D = 76
According to ques , after 7 years
A+B+C+D = 7x+6x+5x+8x = 76+7*4
26x = 76 + 28
X = 104/26
x = 4
C’s present age = 5x – 7 =20 – 7
                                     = 13

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Filed Under: Problems on Ages
Exam Prep: AIEEE , Bank Exams , GATE

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